Metal material welding performance testing device and testing method

Abstract

The invention discloses a metal material welding performance testing device and testing method, and belongs to the technical field of welding testing devices. The metal material welding performance testing device is characterized by comprising a workbench, a fixed clamp is arranged at one end of the workbench, a movable clamp is arranged at the other end of the workbench, and a loading mechanism is arranged between the fixed clamp and the movable clamp; the fixed clamp comprises a fixed seat, the movable clamp comprises a movable seat, and a power structure for driving the movable seat to slide on the supporting table is arranged on the supporting table; clamping mechanisms for clamping a workpiece are arranged on the fixed seat and the movable seat, a vibration structure for applying vibration to the workpiece is arranged in the center of the clamping mechanism on the fixed seat, and the vibration structure is located in the workpiece. By adopting the device and the method for testing the welding performance of the metal material, disclosed by the invention, the problem that an existing testing device cannot be used for testing the tensile property and the compressive property of a welded suspension arm under the condition of multi-load loading can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding testing devices, and in particular to a metal material welding performance testing device and a testing method. Background Art

[0002] The boom of a crane is generally made of steel plates that are bent and welded into a cylindrical structure. The weld of the boom is a weak area of ​​the mechanical properties of the boom. To evaluate the performance of the boom, it is necessary to evaluate the welding performance of the boom. The mechanical performance test after welding is generally carried out by a tensile tester, a bending tester, an impact tester or a torsion tester. These performance testing equipment can only perform a single performance test. During the working process, the crane boom is not only subjected to tensile stress and compressive stress, but also to vibration and bending loads. The boom is affected by multiple loads at the same time, and the stress condition of the boom is relatively complicated. Vibration and bending loads have a relatively obvious effect on the tensile strength of the boom. Simply conducting a tensile strength test or a compressive strength test on the boom after welding cannot truly reflect the performance of the boom in actual working conditions. Therefore, it is particularly important to develop a method that can test the tensile and compressive performance of the boom after welding under multiple loads. Summary of the invention

[0003] The purpose of the present invention is to provide a metal material welding performance testing device and a testing method to solve the problem that the existing testing device cannot perform tensile and compressive performance tests on a welded boom under multiple load conditions.

[0004] To achieve the above-mentioned purpose, the present invention provides a metal material welding performance testing device, including a workbench, a fixed clamp is provided at one end of the workbench, a movable clamp is provided at the other end of the workbench, and a loading mechanism is provided between the fixed clamp and the movable clamp; the fixed clamp includes a fixed seat, the movable clamp includes a movable seat, and a power structure for driving the movable seat to slide on the support table is provided on the support table; clamping mechanisms for clamping the workpiece are provided on the fixed seat and the movable seat, a vibration structure for applying vibration to the workpiece is provided at the center of the clamping mechanism on the fixed seat, and the vibration structure is located inside the workpiece.

[0005] Preferably, the clamping mechanism includes a mounting seat, on which are arranged two groups of cross-shaped clamping structures, and on which is arranged a transmission structure for driving the two groups of clamping structures to slide, wherein the transmission structure includes a first transmission component and a second transmission component, wherein the first transmission component drives one group of two relative clamping structures to slide relative to each other, and the second transmission component drives another group of two relative clamping structures to slide relative to each other.

[0006] Preferably, the first transmission assembly includes a transmission shaft, the transmission shaft is located on one side of the mounting seat and is rotatably connected to the mounting seat through a bearing, a transmission gear is fixedly arranged on the transmission shaft, a first transmission seat and a second transmission seat are respectively arranged on both sides of the transmission gear, a transmission rack meshing with the transmission gear is arranged on the first transmission seat and the second transmission seat close to the transmission gear, a first connecting seat is arranged on the first transmission seat and the second transmission seat, the first transmission seat and the second transmission seat are respectively connected to a group of two clamping structures through the first connecting seat, a first sliding hole for allowing the first connecting seat to pass through the mounting seat is arranged on the mounting seat, a first guide rail for guiding the horizontal sliding of the first transmission seat and the second transmission seat is arranged on the mounting seat, and a cylinder for driving the second transmission seat to slide on the mounting seat is arranged on the mounting seat.

[0007] Preferably, the second transmission assembly includes a transmission plate, which is fixed on the transmission shaft, and both ends of the transmission plate are hinged to two second connecting seats through connecting plates, and the mounting seat is provided with a second sliding hole for allowing the second connecting seat to pass through the mounting seat, and the two second connecting seats are respectively connected to two clamping structures of another group, and the mounting seat is provided with a guide rail that guides the sliding of the second connecting seat.

[0008] Preferably, the clamping structure includes a slide seat, a fixed clamping block is provided at one end of the slide seat close to the center of the mounting seat, a movable clamping block is provided at the other end of the slide seat, a sliding structure for driving the movable clamping block to slide on the slide seat is provided between the slide seat and the mounting seat, fixed plates are fixedly provided on both sides of the slide seat, rollers are rotatably provided on the fixed plates, and a sliding groove that guides the sliding of the slide seat is provided on the mounting seat, and the roller is located in the sliding groove and slides along the sliding groove.

[0009] Preferably, the sliding structure includes a slide plate, which is connected to the movable clamping block via a first limit block, a first limit groove for the first limit block to pass through is provided on the slide seat, and a guide rail for guiding the sliding of the movable clamping block is provided on the slide seat; mounting plates are fixedly provided on both sides of the slide seat, a first connecting shaft and a second connecting shaft are rotatably provided on the mounting plate, a second connecting shaft is provided with a second gear, a second rack meshing with the second gear is fixedly provided on the mounting seat, a first gear meshing with the second gear is provided on the first connecting shaft, and the first gear meshes with the second rack fixedly provided on the slide plate.

[0010] Preferably, the vibration structure includes a rotating shaft, which is rotatably connected to the mounting seat through a bearing, a through hole for the rotating shaft to pass through is provided on the transmission shaft, the rotating shaft is rotatably connected to the transmission shaft, a fixed sleeve is provided at the center of the mounting seat, the fixed sleeve is located outside the rotating shaft, a plurality of sliding rods are provided on the fixed sleeve, the sliding rods are slidably connected to the fixed sleeve, one end of the sliding rod extending out of the fixed sleeve is threadedly connected to a knocking rod, a positioning plate is provided on the sliding rod, a spring is provided between the positioning plate and the outer wall of the fixing sleeve, a cam is provided at the end of the rotating shaft, and one end of the sliding rod located inside the fixing sleeve contacts with the side wall of the cam under the action of the spring; a support plate is provided on the outside of the mounting seat, the support plate is fixedly connected to the mounting seat through the support rod, the rotating shaft and the support plate are rotatably connected through the bearing, and a first motor that drives the rotating shaft to rotate is provided on the support plate.

[0011] Preferably, the power structure includes an adjusting seat, the movable seat is arranged above the adjusting seat, a second limit block is arranged at the bottom of the adjusting seat, and an arc-shaped second limit groove is arranged on the support platform for the second limit platform to pass through. The adjusting seat is connected to the power plate through the second limit block, and a third gear is rotatably arranged on the power plate, and an arc-shaped third rack meshing with the third gear is arranged on the support platform, the third rack is arranged concentrically with the second limit groove, a second motor that drives the third gear to rotate is arranged on the power plate, and an arc-shaped fourth guide rail that has a supporting and guiding function for the power plate is arranged on the support platform, and an arc-shaped third guide rail that has a guiding function for the sliding of the adjusting seat is arranged on the upper surface of the support platform; a first hydraulic cylinder that drives the movable seat to slide on the adjusting seat is arranged on the adjusting seat, a tension and compression sensor is arranged between the first hydraulic cylinder and the movable seat, and a second guide rail that has a guiding function for the sliding of the movable seat is arranged on the adjusting seat, and the movable seat slides along a straight line passing through the center of the second limit groove.

[0012] Preferably, the loading mechanism includes a fixed frame, which is fixedly mounted on a support platform, and a second hydraulic cylinder is arranged on the top and / or side of the fixed frame. A pressure head for applying a load to the side wall of the workpiece is arranged on the piston rod of the second hydraulic cylinder, and the piston rod and the pressure head are connected via a pressure sensor.

[0013] The testing method of the above-mentioned metal material welding performance testing device comprises the following steps: S1. Adjust the position of the movable fixture according to the shape and size of the workpiece, start the second motor, the second motor drives the third gear to rotate, the third gear slides along the third rack, the third gear drives the adjustment seat to slide along the second limit groove through the power plate and the second limit block, and the adjustment seat drives the movable fixture to move to the set position; S2. Place the workpiece between the movable fixture and the fixed fixture, and the first hydraulic cylinder drives the movable seat to move, insert the fixed clamp on the movable seat into the workpiece, and insert the fixed clamp of the fixed fixture into the workpiece; start the cylinder, and the cylinder drives the second transmission seat to slide outward along the first guide rail, and the second transmission seat drives the transmission gear to rotate through the rack, and the transmission gear drives the first transmission seat to slide outward through the rack, and the first transmission seat and the second transmission seat respectively drive the clamping structure to slide outward through the first connecting seat; at the same time, the transmission gear drives the transmission shaft to rotate, and the transmission shaft drives the transmission plate to rotate, and the two ends of the transmission plate respectively drive the second connecting seat to slide along the second sliding hole through the connecting plate, and the second connecting seat drives the clamping structure to slide outward, and the fixed clamp on the clamp contacts the inner wall of the workpiece; S3, the first connecting seat and the second connecting seat drive the clamping structure to slide outward through the sliding seat, while the sliding seat drives the first connecting shaft and the second connecting shaft to slide synchronously through the mounting plate, the second gear rotates under the action of the second rack, the second gear drives the first rack to slide through the first gear, the first rack drives the slide plate to slide, the slide plate drives the movable clamp block to move toward the fixed clamp block through the first limit block, the fixed clamp block clamps the inner wall of the workpiece while the movable clamp block clamps the outer wall of the workpiece; clamping of both ends of the workpiece is achieved; S4, the first motor is started, the first motor drives the rotating shaft to rotate, the rotating shaft drives the cam to rotate, the cam drives the sliding rod to slide along the fixed sleeve through its side wall, the sliding rod drives the knocking rod to slide synchronously, and the knocking rod knocks the workpiece through the inner wall of the workpiece to apply vibration; S5, starting the second hydraulic cylinder, the second hydraulic cylinder drives the pressing head to move toward the outer wall of the workpiece, and the pressing head applies a bending load to the outer wall of the workpiece; S6. Test the tensile and compressive properties of the workpiece under vibration and bending loads.

[0014] The advantages and positive effects of the metal material welding performance testing device and testing method described in the present invention are: 1. The present invention sets a loading mechanism on the support platform to facilitate simulation of the actual working condition of the workpiece under bending load. Set a vibration structure on the fixed fixture to facilitate the setting of the vibration structure and simulate the actual working condition of the workpiece under vibration.

[0015] 2. The present invention sets a transmission structure on the mounting seat to drive the clamping structure to slide, and the first transmission assembly and the second transmission assembly of the transmission structure respectively drive the four clamping structures to move synchronously, which is easy to operate. The four clamping structures are used to clamp the workpiece, and the four sides of the rectangular workpiece are clamped respectively, which improves the stability of the workpiece clamping.

[0016] 3. The present invention sets a sliding structure between the slide seat and the mounting seat, so that the fixed clamping block clamps the inner wall of the workpiece while the movable clamping block moves synchronously to clamp the outer wall of the workpiece, thereby facilitating the clamping operation of the workpiece.

[0017] 4. The movable fixture of the present invention can adjust the angle as needed to meet the test requirements of various workpieces and improve adaptability.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the clamping mechanism according to an embodiment of the present invention; Figure 3 Schematic diagram of the transmission structure of an embodiment of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of a fixing fixture according to an embodiment of the present invention; Figure 5 for Figure 4 Middle A enlarged view; Figure 6 A schematic diagram of a cross-sectional structure of a fixing fixture according to an embodiment of the present invention; Figure 7 for Figure 6 Middle B: Enlarged view; Figure 8 It is a bottom view structural schematic diagram of an embodiment of the present invention; Fig. 9 It is a schematic diagram of the partial structure of the loading mechanism according to an embodiment of the present invention.

[0020] Reference numerals 1. Workbench; 11. Support table; 12. Support legs; 2. Fixing fixture; 21. Fixing seat; 22. Mounting seat; 23. Sliding seat; 24. First sliding hole; 25. Second sliding hole; 26. First connecting seat; 27. Second connecting seat; 28. First transmission seat; 29. ​​Second transmission seat; 210. Transmission shaft; 211. Transmission gear; 212. First guide rail; 213. Cylinder; 214. Transmission plate; 215. Connecting plate; 216. Fixed clamp; 217. Movable clamp; 218. Slideway; 219. Fixed plate; 220. Roller; 221, first limit block; 222, first limit groove; 223, slide plate; 224, first rack; 225, mounting plate; 226, first connecting shaft; 227, second connecting shaft; 228, first gear; 229, second gear; 230, second rack; 231, fixing sleeve; 232, rotating shaft; 233, cam; 234, slide bar; 235, knocking bar; 236, positioning plate; 237, spring; 238, support plate; 239, support rod; 240, first motor; 3. movable fixture; 31. movable seat; 32. adjustment seat; 33. second guide rail; 34. second limit groove; 35. third guide rail; 36. first hydraulic cylinder; 37. second limit block; 38. power plate; 39. third gear; 310. second motor; 311. third rack; 312. fourth guide rail; 4. Loading mechanism; 41. Fixed frame; 42. Second hydraulic cylinder; 43. Press head. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application. In the event of any inconsistency, the meaning described in this specification or the meaning derived from the contents recorded in this specification shall prevail. In addition, the terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application. In order to accurately describe the technical content in this application and to accurately understand the present invention, the following explanations or definitions are given to the terms used in this specification before describing the specific embodiments: The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown. A metal material welding performance testing device includes a workbench 1, and the workbench 1 includes a support table 11 and support legs 12. The support table 11 provides support for a fixed clamp 2, a movable clamp 3 and a loading mechanism 4. The support legs 12 are fixed on the support table 11 to support the support table 11. A fixed clamp 2 is provided at one end of the workbench 1, and a movable clamp 3 is provided at the other end of the workbench 1. The fixed clamp 2 and the movable clamp 3 clamp the two ends of the workpiece respectively. The movable clamp 3 can adjust the angle and length to meet the clamping needs of workpieces of different lengths and bending angles. A loading mechanism 4 is provided between the fixed clamp 2 and the movable clamp 3, and the loading mechanism 4 is used to apply lateral force to the workpiece and apply bending load to the workpiece.

[0024] like Figure 2 As shown. The fixed clamp 2 includes a fixed seat 21, and the movable clamp 3 includes a movable seat 31. The fixed seat 21 and the movable seat 31 are both provided with a clamping mechanism for clamping the workpiece. The clamping mechanism includes a mounting seat 22, and the mounting seat 22 is fixedly arranged on the fixed seat 21 and the movable seat 31. Two groups of cross-shaped clamping structures are arranged on the mounting seat 22, and a transmission structure for driving the two groups of clamping structures to slide is arranged on the mounting seat 22. The transmission structure includes a first transmission assembly and a second transmission assembly, and the first transmission assembly drives a group of two relative clamping structures to slide relative to each other, and the second transmission assembly drives another group of two relative clamping structures to slide relative to each other. The first transmission assembly and the second transmission assembly are used to realize the centering clamping of the rectangular workpiece.

[0025] like Figure 3As shown. The first transmission assembly includes a transmission shaft 210, which is located at one side of the mounting seat 22 and is rotatably connected to the mounting seat 22 through a bearing. A transmission gear 211 is fixedly arranged on the transmission shaft 210, and a first transmission seat 28 and a second transmission seat 29 are respectively arranged on both sides of the transmission gear 211. A transmission rack meshing with the transmission gear 211 is fixedly arranged on one side of the first transmission seat 28 and the second transmission seat 29 close to the transmission gear 211. The relative and divergent sliding of the first transmission seat 28 and the second transmission seat 29 is achieved through the transmission gear 211.

[0026] The first transmission seat 28 and the second transmission seat 29 are both fixedly provided with a first connecting seat 26, and the first transmission seat 28 and the second transmission seat 29 are respectively fixedly connected to a set of two clamping structures through the first connecting seat 26. The mounting seat 22 is provided with a first sliding hole 24 for the first connecting seat 26 to pass through the mounting seat 22, and the mounting seat 22 is fixedly provided with a first guide rail 212 that has a guiding function for the horizontal sliding of the first transmission seat 28 and the second transmission seat 29. The mounting seat 22 is fixedly provided with a cylinder 213 that drives the second transmission seat 29 to slide on the mounting seat 22. The cylinder 213 provides power for the rotation of the rotating shaft 232.

[0027] The second transmission assembly includes a transmission plate 214, which is fixed on the transmission shaft 210. Both ends of the transmission plate 214 are respectively hinged to the two second connection seats 27 through the connection plates 215. The mounting seat 22 is provided with a second sliding hole 25 for the second connection seat 27 to pass through the mounting seat 22, and the two second connection seats 27 are respectively connected to the two clamping structures of another group. The mounting seat 22 is fixedly provided with a guide rail that has a guiding effect on the sliding of the second connection seat 27.

[0028] The first transmission assembly and the second transmission assembly are both driven by the transmission shaft 210, and the operation of the first transmission assembly and the second transmission assembly is realized through a power element cylinder 213, that is, the clamping structure clamps the workpiece, which is easy to operate.

[0029] like Figure 4 , Figure 5 , Figure 7As shown. The clamping structure includes a slide 23, and a fixed clamp block 216 is fixedly provided at one end of the slide 23 near the center of the mounting seat 22, and a movable clamp block 217 is provided at the other end of the slide 23. A sliding structure is provided between the slide 23 and the mounting seat 22 to drive the movable clamp block 217 to slide on the slide 23. While the fixed clamp block 216 clamps the workpiece, the movable clamp block 217 moves to clamp the outer wall of the workpiece, which is convenient for the clamping operation of the workpiece. Fixed plates 219 are fixedly provided on both sides of the slide 23, and rollers 220 are rotatably provided on the fixed plates 219. A slide groove 218 that guides the sliding of the slide 23 is provided on the mounting seat 22, and the roller 220 is located in the slide groove 218 and slides along the slide groove 218. The slide groove 218 and the roller 220 support and guide the sliding of the slide 23, which facilitates the sliding of the slide 23 and improves the sliding stability of the slide 23.

[0030] The sliding structure includes a slide plate 223, and the slide plate 223 is fixedly connected to the movable clamping block 217 through a first limit block 221. The slide seat 23 is provided with a first limit groove 222 for the first limit block 221 to pass through. The first limit block 221 is slidably connected to the first limit groove 222. A guide rail that has a guiding effect on the sliding of the movable clamping block 217 is fixedly provided on the slide seat 23. Mounting plates 225 are fixedly provided on both sides of the slide seat 23, and a first connecting shaft 226 and a second connecting shaft 227 are rotatably provided on the mounting plate 225 through bearings. A second gear 229 is fixedly provided on the second connecting shaft 227, and a second rack 230 meshing with the second gear 229 is fixedly provided on the mounting seat 22. A first gear 228 meshing with the second gear 229 is fixedly provided on the first connecting shaft 226, and the first gear 228 meshes with the second rack 230 fixedly provided on the slide plate 223. When the slide 23 moves, the slide 23 drives the first gear 228 and the second gear 229 to move synchronously. The second gear 229 rotates under the action of the second rack 230. The second gear 229 drives the first rack 224 to slide through the first gear 228. The first rack 224 drives the movable clamp 217 to move toward the fixed clamp 216 through the slide plate 223, thereby clamping the workpiece for easy operation.

[0031] The surfaces of the fixed clamp block 216 and the movable clamp block 217 that contact the workpiece are provided with anti-skid grooves to improve the stability of clamping the workpiece. The bottoms of the fixed clamp block 216 and the movable clamp block 217 are provided with positioning bosses for positioning the workpiece, which facilitates the installation of the workpiece.

[0032] like Figure 6As shown. A vibration structure for applying vibration to the workpiece is arranged at the center of the clamping mechanism on the fixed seat 21, and the vibration structure is located inside the workpiece. The vibration structure includes a rotating shaft 232, and the rotating shaft 232 is rotatably connected to the mounting seat 22 through a bearing. A through hole is arranged on the transmission shaft 210 for the rotating shaft 232 to pass through, and the rotating shaft 232 is rotatably connected to the transmission shaft 210. A fixed sleeve 231 is fixedly arranged at the center of the mounting seat 22, and the fixed sleeve 231 is located outside the rotating shaft 232. A bearing seat can be arranged between the rotating shaft 232 and the fixed sleeve 231, and the rotating shaft 232 is supported by the bearing seat, and the rotational connection between the rotating shaft 232 and the fixed sleeve 231 is ensured.

[0033] The fixing sleeve 231 is provided with a plurality of slide bars 234, which are slidably connected to the fixing sleeve 231. One end of the slide bar 234 extending out of the fixing sleeve 231 is threadedly connected with a knocking rod 235, which can be replaced as needed, so that the replacement of the knocking rod 235 is convenient. A positioning plate 236 is fixedly provided on the slide bar 234, and a spring 237 is provided between the positioning plate 236 and the outer wall of the fixing sleeve 231, and the spring 237 is sleeved on the outside of the slide bar 234.

[0034] The end of the rotating shaft 232 is fixedly provided with a cam 233, and one end of the sliding rod 234 located inside the fixed sleeve 231 contacts the side wall of the cam 233 under the action of the spring 237. The rotating shaft 232 drives the cam 233 to rotate, and the cam 233 drives the knocking rod 235 to slide back and forth through the sliding rod 234, thereby applying vibration to the workpiece through the inside of the workpiece to simulate the vibration working condition of the workpiece.

[0035] A support plate 238 is disposed outside the mounting seat 22, and the support plate 238 is fixedly connected to the mounting seat 22 via a support rod 239. The rotating shaft 232 is rotatably connected to the support plate 238 via a bearing, and a first motor 240 is disposed on the support plate 238 to drive the rotating shaft 232 to rotate.

[0036] like Figure 1 , Figure 8As shown. A power structure for driving the movable seat 31 to slide on the support platform 11 is provided on the support platform 11. The power structure includes an adjustment seat 32, and the movable seat 31 is arranged above the adjustment seat 32. A second limit block 37 is fixedly provided at the bottom of the adjustment seat 32, and an arc-shaped second limit groove 34 is provided on the support platform 11 for the second limit platform to pass through, and the second limit block 37 is slidably connected to the second limit groove 34. The adjustment seat 32 is fixedly connected to the power plate 38 through the second limit block 37, and the power plate 38 is located on the lower surface of the support platform 11. A third gear 39 is rotatably provided on the power plate 38 through a bearing, and an arc-shaped third rack 311 meshing with the third gear 39 is fixedly provided on the support platform 11. The third rack 311 is arranged concentrically with the second limit groove 34. A second motor 310 that drives the third gear 39 to rotate is fixedly provided on the power plate 38. An arc-shaped fourth guide rail 312 is fixedly disposed on the support platform 11 for supporting and guiding the power plate 38 . The fourth guide rail 312 is concentrically disposed with the second limiting groove 34 .

[0037] The upper surface of the support table 11 is fixedly provided with an arc-shaped third guide rail 35 that has a guiding effect on the sliding of the adjustment seat 32, and the third guide rail 35 is arranged concentrically with the second limit groove 34. The adjustment seat 32 is fixedly provided with a first hydraulic cylinder 36 that drives the movable seat 31 to slide on the adjustment seat 32, and a tension and compression sensor is arranged between the first hydraulic cylinder 36 and the movable seat 31, and the tension and compression sensor is used to measure the tensile stress and compressive stress applied to the workpiece through the movable seat 31. The first hydraulic cylinder 36 can also be arranged at the center of the movable seat 31 to improve the uniformity of the force. The adjustment seat 32 is fixedly provided with a second guide rail 33 that has a guiding effect on the sliding of the movable seat 31, and the movable seat 31 slides along a straight line passing through the center of the second limit groove 34.

[0038] In order to further improve the application range of the welding measurement device, a sliding platform can be added between the adjustment seat 32 and the movable seat 31, a hydraulic cylinder is provided on the adjustment seat 32 to adjust the position of the sliding platform, and the first hydraulic cylinder 36 is provided on the sliding platform. In this way, the adjustment range of the movable seat 31 can be increased.

[0039] like Figure 1 , Fig. 9 As shown. The loading mechanism 4 includes a fixed frame 41, which is fixedly arranged on the support platform 11. A second hydraulic cylinder 42 is arranged on the top or / and the side of the fixed frame 41, and a pressure head 43 for applying a load to the side wall of the workpiece is arranged on the piston rod of the second hydraulic cylinder 42, and the piston rod and the pressure head 43 are connected through a pressure sensor. Pressure in a certain direction is applied to the side wall of the workpiece as required to apply a bending load to the workpiece.

[0040] The testing device shown in this embodiment is a horizontal structure, and can also be set as a vertical structure according to needs, that is, the support platform 11 is rotated 90°.

[0041] The testing method of the above-mentioned metal material welding performance testing device comprises the following steps: S1. Adjust the position of the movable fixture 3 according to the shape and size of the workpiece, start the second motor 310, the second motor 310 drives the third gear 39 to rotate, the third gear 39 slides along the third rack 311, the third gear 39 drives the adjustment seat 32 to slide along the second limit groove 34 through the power plate 38 and the second limit block 37, and the adjustment seat 32 drives the movable fixture 3 to move to the set position.

[0042] S2. Place the workpiece between the movable fixture 3 and the fixed fixture 2. The first hydraulic cylinder 36 drives the movable seat 31 to move. The fixed clamp 216 on the movable seat 31 is inserted into the workpiece. The fixed clamp 216 of the fixed fixture 2 is inserted into the workpiece. The cylinder 213 is started. The cylinder 213 drives the second transmission seat 29 to slide outward along the first guide rail 212. The second transmission seat 29 drives the transmission gear 211 to rotate through the rack. The transmission gear 211 drives the first transmission seat 28 to slide outward through the rack. The first transmission seat 28 and the second transmission seat 29 drive the clamping structure to slide outward through the first connecting seat 26. At the same time, the transmission gear 211 drives the transmission shaft 210 to rotate. The transmission shaft 210 drives the transmission plate 214 to rotate. The two ends of the transmission plate 214 drive the second connecting seat 27 to slide along the second sliding hole 25 through the connecting plate 215. The second connecting seat 27 drives the clamping structure to slide outward. The fixed clamp 216 on the clamp contacts the inner wall of the workpiece.

[0043] S3, the first connecting seat 26 and the second connecting seat 27 drive the clamping structure to slide outward through the slide 23, while the slide 23 drives the first connecting shaft 226 and the second connecting shaft 227 to slide synchronously through the mounting plate 225, the second gear 229 rotates under the action of the second rack 230, the second gear 229 drives the first rack 224 to slide through the first gear 228, the first rack 224 drives the slide plate 223 to slide, and the slide plate 223 drives the movable clamp block 217 to move toward the fixed clamp block 216 through the first limit block 221. While the fixed clamp block 216 clamps the inner wall of the workpiece, the movable clamp block 217 clamps the outer wall of the workpiece, so as to achieve clamping of both ends of the workpiece.

[0044] S4, the first motor 240 is started, the first motor 240 drives the rotating shaft 232 to rotate, the rotating shaft 232 drives the cam 233 to rotate, the cam 233 drives the sliding rod 234 to slide along the fixed sleeve 231 through its side wall, the sliding rod 234 drives the knocking rod 235 to slide synchronously, and the knocking rod 235 knocks the workpiece through the inner wall of the workpiece to apply a vibration load.

[0045] S5. Start the second hydraulic cylinder 42, which drives the pressing head 43 to move toward the outer wall of the workpiece, and the pressing head 43 applies a bending load to the outer wall of the workpiece.

[0046] S6. Test the tensile and compressive properties of the workpiece under vibration and bending loads, and draw the stress-strain curve of the tensile strength test or compression test of the workpiece under vibration and bending loads through existing software.

[0047] Therefore, the metal material welding performance testing device and testing method described in the present invention can solve the problem that the existing testing device cannot perform tensile and compressive performance tests on the welded boom under multiple load conditions.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A metal material welding performance testing device, characterized in that: It includes a workbench, a fixed clamp is arranged at one end of the workbench, a movable clamp is arranged at the other end of the workbench, and a loading mechanism is arranged between the fixed clamp and the movable clamp; the fixed clamp includes a fixed seat, the movable clamp includes a movable seat, and a power structure for driving the movable seat to slide on the support table is arranged on the support table; clamping mechanisms for clamping the workpiece are arranged on the fixed seat and the movable seat, a vibration structure for applying vibration to the workpiece is arranged at the center of the clamping mechanism on the fixed seat, and the vibration structure is located inside the workpiece.

2. A metal material welding performance testing device according to claim 1, characterized in that: The clamping mechanism includes a mounting seat, on which are arranged two groups of cross-shaped clamping structures, and on which is arranged a transmission structure for driving the two groups of clamping structures to slide. The transmission structure includes a first transmission component and a second transmission component. The first transmission component drives one group of two relative clamping structures to slide relative to each other, and the second transmission component drives another group of two relative clamping structures to slide relative to each other.

3. A metal material welding performance testing device according to claim 2, characterized in that: The first transmission assembly includes a transmission shaft, the transmission shaft is located on one side of the mounting seat and is rotatably connected to the mounting seat through a bearing, a transmission gear is fixedly arranged on the transmission shaft, a first transmission seat and a second transmission seat are respectively arranged on both sides of the transmission gear, a transmission rack meshing with the transmission gear is arranged on the first transmission seat and the second transmission seat close to the transmission gear, a first connecting seat is arranged on the first transmission seat and the second transmission seat, the first transmission seat and the second transmission seat are respectively connected to a group of two clamping structures through the first connecting seat, a first sliding hole for allowing the first connecting seat to pass through the mounting seat is arranged on the mounting seat, a first guide rail for guiding the horizontal sliding of the first transmission seat and the second transmission seat is arranged on the mounting seat, and a cylinder for driving the second transmission seat to slide on the mounting seat is arranged on the mounting seat.

4. A metal material welding performance testing device according to claim 3, characterized in that: The second transmission assembly includes a transmission plate, which is fixed on the transmission shaft. Both ends of the transmission plate are hinged to two second connecting seats through connecting plates. The mounting seat is provided with a second sliding hole for allowing the second connecting seat to pass through the mounting seat. The two second connecting seats are respectively connected to two clamping structures of another group. The mounting seat is provided with a guide rail that guides the sliding of the second connecting seat.

5. A metal material welding performance testing device according to claim 4, characterized in that: The clamping structure includes a slide seat, a fixed clamping block is arranged at one end of the slide seat close to the center of the mounting seat, a movable clamping block is arranged at the other end of the slide seat, a sliding structure for driving the movable clamping block to slide on the slide seat is arranged between the slide seat and the mounting seat, fixed plates are fixedly arranged on both sides of the slide seat, rollers are rotatably arranged on the fixed plates, and a sliding groove that guides the sliding of the slide seat is arranged on the mounting seat, and the roller is located in the sliding groove and slides along the sliding groove.

6. A metal material welding performance testing device according to claim 5, characterized in that: The sliding structure includes a slide plate, which is connected to the movable clamping block by a first limit block, a first limit groove for the first limit block to pass through is provided on the slide seat, and a guide rail for guiding the sliding of the movable clamping block is provided on the slide seat; mounting plates are fixedly provided on both sides of the slide seat, a first connecting shaft and a second connecting shaft are rotatably provided on the mounting plate, a second connecting shaft is provided with a second gear, a second rack meshing with the second gear is fixedly provided on the mounting seat, a first connecting shaft is provided with a first gear meshing with the second gear, and the first gear meshes with the second rack fixedly provided on the slide plate.

7. A metal material welding performance testing device according to claim 6, characterized in that: The vibration structure includes a rotating shaft, which is rotatably connected to the mounting seat through a bearing, a through hole for the rotating shaft to pass through is provided on the transmission shaft, the rotating shaft is rotatably connected to the transmission shaft, a fixed sleeve is provided at the center of the mounting seat, the fixed sleeve is located outside the rotating shaft, a plurality of sliding rods are provided on the fixed sleeve, the sliding rods are slidably connected to the fixed sleeve, one end of the sliding rod extending out of the fixed sleeve is threadedly connected to a knocking rod, a positioning plate is provided on the sliding rod, a spring is provided between the positioning plate and the outer wall of the fixing sleeve, a cam is provided at the end of the rotating shaft, and one end of the sliding rod located inside the fixing sleeve contacts with the side wall of the cam under the action of the spring; a support plate is provided on the outside of the mounting seat, the support plate is fixedly connected to the mounting seat through the support rod, the rotating shaft and the support plate are rotatably connected through the bearing, and a first motor that drives the rotating shaft to rotate is provided on the support plate.

8. A metal material welding performance testing device according to claim 7, characterized in that: The power structure includes an adjusting seat, a movable seat is arranged above the adjusting seat, a second limit block is arranged at the bottom of the adjusting seat, a second arc-shaped limit groove is arranged on the support platform for the second limit platform to pass through, the adjusting seat is connected to the power plate through the second limit block, a third gear is rotatably arranged on the power plate, a third arc-shaped rack meshing with the third gear is arranged on the support platform, the third rack is arranged concentrically with the second limit groove, a second motor is arranged on the power plate to drive the third gear to rotate, a fourth arc-shaped guide rail with a supporting and guiding function for the power plate is arranged on the support platform, and a third arc-shaped guide rail with a guiding function for the sliding of the adjusting seat is arranged on the upper surface of the support platform; a first hydraulic cylinder is arranged on the adjusting seat to drive the movable seat to slide on the adjusting seat, a tension and compression sensor is arranged between the first hydraulic cylinder and the movable seat, a second guide rail with a guiding function for the sliding of the movable seat is arranged on the adjusting seat, and the movable seat slides along a straight line passing through the center of the second limit groove.

9. A metal material welding performance testing device according to claim 8, characterized in that: The loading mechanism includes a fixed frame, which is fixedly arranged on the support platform. A second hydraulic cylinder is arranged on the top and / or side of the fixed frame. A pressure head for applying a load to the side wall of the workpiece is arranged on the piston rod of the second hydraulic cylinder. The piston rod and the pressure head are connected through a pressure sensor.

10. A testing method for a metal material welding performance testing device according to claim 9, characterized in that: The following steps are involved: S1. Adjust the position of the movable fixture according to the shape and size of the workpiece, start the second motor, the second motor drives the third gear to rotate, the third gear slides along the third rack, the third gear drives the adjustment seat to slide along the second limit groove through the power plate and the second limit block, and the adjustment seat drives the movable fixture to move to the set position; S2. Place the workpiece between the movable fixture and the fixed fixture, and the first hydraulic cylinder drives the movable seat to move, insert the fixed clamp on the movable seat into the workpiece, and insert the fixed clamp of the fixed fixture into the workpiece; start the cylinder, and the cylinder drives the second transmission seat to slide outward along the first guide rail, and the second transmission seat drives the transmission gear to rotate through the rack, and the transmission gear drives the first transmission seat to slide outward through the rack, and the first transmission seat and the second transmission seat respectively drive the clamping structure to slide outward through the first connecting seat; at the same time, the transmission gear drives the transmission shaft to rotate, and the transmission shaft drives the transmission plate to rotate, and the two ends of the transmission plate respectively drive the second connecting seat to slide along the second sliding hole through the connecting plate, and the second connecting seat drives the clamping structure to slide outward, and the fixed clamp on the clamp contacts the inner wall of the workpiece; S3, the first connecting seat and the second connecting seat drive the clamping structure to slide outward through the sliding seat, while the sliding seat drives the first connecting shaft and the second connecting shaft to slide synchronously through the mounting plate, the second gear rotates under the action of the second rack, the second gear drives the first rack to slide through the first gear, the first rack drives the slide plate to slide, the slide plate drives the movable clamp block to move toward the fixed clamp block through the first limit block, the fixed clamp block clamps the inner wall of the workpiece while the movable clamp block clamps the outer wall of the workpiece; clamping of both ends of the workpiece is achieved; S4, the first motor is started, the first motor drives the rotating shaft to rotate, the rotating shaft drives the cam to rotate, the cam drives the sliding rod to slide along the fixed sleeve through its side wall, the sliding rod drives the knocking rod to slide synchronously, and the knocking rod knocks the workpiece through the inner wall of the workpiece to apply vibration; S5, starting the second hydraulic cylinder, the second hydraulic cylinder drives the pressing head to move toward the outer wall of the workpiece, and the pressing head applies a bending load to the outer wall of the workpiece; S6. Test the tensile and compressive properties of the workpiece under vibration and bending loads.

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